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Patented Dec. 28,1880.

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IINHBD STATES PATILNT l Ormes.

AUSTIN S. PARKS AND AMRO W. STREE'IER, OF WINOHENDON, MASS., AS-

SIGNORS OF ONE-THIRD TO CHARLES J. RICE, OF SAME PLACE.

GAGE FOR SWING IRREGULAR CURVES.

SPECIFICATION forming part of Letters Patent No. 236,075, dated December 28, 1880.

Application filed November 1, 1880. (Model.)

invention sufficiently full, clear, and exact tov io enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

It has heretofore been customary, when sawj ing chair-stock and similar curved pieces, to

mark out the curved form of the frames on the face of the plank or board by the aid of a suitable pattern, and to then saw the curves as indicated by the lines so marked, moving zo the plank or stock upon the saw-table as required, considerable skill being necessary for producing uniform work, and much time being consumed in the marking and sawing.

The object ot out present invention is to pro- 2 5 vide a mechanism, applicable to ordinary sawin g-machines, for carrying or guiding the stock or plank. to the saw in such a manner that properly curved pieces can be quickly and conveniently sawed out without the necessity of 3o any previous marking and by unskilled operatives; also,-to afford means for the adjustment of the apparatus to saw curved pieces of different size and curvature and to render theaction of the mechanism simple and conven- 5 ient. These objects we attain by mechanism substantially such as shown in the accompanying drawings, and herein described, the V.subject-matter claimed being hereinafter denitely specited.

In the drawings, Figure l represen ts a front view of our improved apparatus for sawing chair-stock, tc. Fig. 2 is a plan view of the same, the broken lines and the dot-and-broken lines indicating various positions of the parts. Fig. 3 is a transverse section of the arms at line m x, Fig. 2.

Our improved apparatus, as herein shown, is intended to be applied as an accessory to the ordinary sawing-machines-band-saws or 5o jig-saws-such as are commonly employed for workin g chair-stock and similar material; but,

it desired, it might be embraced in the construction as a part of the sawing-machine itselt without departure from the nature of the invention.

A denotes the bed-piece, which is to be secured rigidly to the frame or table of the sawin g-machine (or it may be a part of the same) in such relation to the saw B that the latter will occupy a position substantially as shown. 6o

O indicates a swinging frame, mounted on the bed-piece A and having an arm, C', which is fulcrumed or pivoted to an arm, A', projecting laterally from the bed-piece A, by means of an adjustably-arranged pivoting device or hinge, D, the center pin, d, of which connects the parts C A together, and serves as a center or axis, on which the frame G swings horizontally. The hinge D may be arranged, as illustrated in Fig. 3, with its parts respectively 7o tted to slide on the under-cut ways a c, on the side of the arms A C', and adapted to be clamped or secured at any adjusted position by set-screws a o', or in other suitable manner.

E indicates the work-supporting table, arranged to swing upon the frame C, to which it is pivoted by the stud or screw F, the swinging movement being in lateral direction, but opposite in direction to the swing of the frame O. A series of holes, e, are provided for the 8o adjustment of the stud F, to vary the position of the axis on which the table E swings. A suitable channel or keri, E', is formed through the table E for the" passage of the saw B, and, if desired, the borders of said channel may be 8 5 re-enforced by a removable metal plate, a series of such plates being interchangeably employed to correspond with curves of dil'erent radius or character. 4

Gr G indicate gagedogs, for assistance in 9o placing the work in position, and H is the front breast or bearer for the end of the plank.

I indicates a spring-latch arranged on the front of the frame C, which serves for engaging the lug or pin I and retaining the table E when the arm O swings forward.

J indicates a spring-latch arranged on the outer side of the frame C, which serves for engaging with the stud K, fixed on the bedplate A, and thereby retaining the frame C Ioo while the table E is swung back.

L indicates a stud tix'ed in the bed-plate A,

which serves as a stop for the frame C in its forward movement, and also as a cast-ottl to the latch I.

M indicates a lug or pin dependent from the table E, which serves as a stop for the swing movement of said table E and as a east-ott for the latch J.

These several parts are combined and arranged for action as illustrated.

Screws are arranged through openings in the ends of the spring-latches to limit their outward movement and adjust them for per feet action.

Parts required for supporting and operating the saw, and not herein shown and described, may be arranged in any ordinary or suitable manner, either for band or jig sawing, as preferred.

In the operation the frame C is swung forward against the stud L, which throws oli' the latch I from the lug I', and permits the table E to be swung outward to the position indicated by the dot-and-broken lines V, Fig. 2, at the same time permitting the latch J to catch onto the stud K for retaining the frame G in its forward position-fi. e., as indicated in full lines, Fig. 2. rlhe plank or lumber, cut to t'he required length, is placed upon the table E when at position V, with its end against the breast H and its side against the gage-dogs G, and the table is then swung back to carry the plank in contact with the saw B. lhe table E swings ou the pivot F until the lug or pin M strikes the latch J and casts it oftl from the stud K, thereby releasing the frame C, which, as it starts to swing backward, relieves the latch I from the stud L, permitting it to catch onto the pin l for retaining the table E, while the frame C and table swing backward ou the axis d to the position indicated by the broken lines NV; completing the movement required for sawing the stock. rlhe movement of the parts, as above described, causes the saw to take a course through the plank corresponding with the channel Ef, or a compound curve composed of arcs having radii equal, respectively, to the distance from the stud-center F to the saw and from the stud-center d to the saw.

By adjusting the pivots F and al toward or from the saw the curves may be varied and the apparatus adapted for dit't'erent sizes and shapes of chair-frames, &c.

What we claim as ofour invention, and desire to secure by Letters Patent, is-

l. An apparatus for sawing chair-stock and similar pieces, consisting ot' a horizontallyswinging frame pivoted to the bed or body of a saw-machine and carrying a horizontallyswinging work-supporting table pivoted to said frame and adapted to swing in opposite direction thereto, substantially as and for the purposes set forth.

2. The combination, substantially as described, of the bed-piece A, the horizontallyswinging frame C, pivoted to said bed, and the work-supporting table E, pivoted to said frame, and stops L and M, for the purpose set forth.

3. The combination, substantially as described, of the bed-piece A, the horizontallyswinging frame C, connected thereto by thc adjustable pivot or hinge D d, the horizontally-swinging work-table E, connected with said frame by an adjustable pivot, F, and arranged to operate in relation to the saw B as set forth.

4. The conlbii'lation, with the bed-piece A, frame C, and table E, respectively pivoted for right and left swinging action, as set forth, of

.the spring-latches l and J, located at the front and side ot' said frame, the studs or pins L K, attached to said bed-piece, and the studs or pins I M, attached to said table for engaging with the respective latches and operating in connection therewith to alternately confine and release the swinging parts, substantially as described.

fitness our hands this 29th day of October, A. D. 1880.

AUSTIN S. PARKS. AMRO W. STREETER.

Vitnesses GEO. M. WHITNEY, WILDER P. CLARK. 

